邮件为例具体讲解下邮件认证: 首先我们来讲其中一个重要的DKIM-Signature,大家看advertcn的邮件头就有DKIM信息, DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=e.advertcn.com; s=default; h=Date:Message-Id:Content-Transfer-Encoding:Content-type:MIME-Version:From:Subject:To; bh=CYJPxiyGbv1b8lb6ARhaBoJhfdizppB4C1WTbFzmwqY=; b=tbpi2GShQQAKtDPbxUyOsYepi6t9fZWCIj6SmgXmdi1V9mLe+LrPEV7INri4jkvOaFvXBWRw66K/97umJ43ydjBVymULAhmSy4HsPbgf+1ZK+/Gkqzj/fVyJobusIt2CIGsxYBCQjPBGjMzeeJ1R+RZhhZu7Wo9o9ohG729QG0s=; Received: from advertcn by e.advertcn.com with local (Exim 4.80) (envelope-from <advertcn@e.advertcn.com>) id 1Tn0F5-0007Lw-EG for *****@qq.com; Sun, 23 Dec 2012 21:06:23 -0800
包括使用esp—mailchimp发布newsletter邮件头里头也有DKIM信息。